EP1517538A8 - Appareil de lecture de documents - Google Patents

Appareil de lecture de documents Download PDF

Info

Publication number
EP1517538A8
EP1517538A8 EP04021914A EP04021914A EP1517538A8 EP 1517538 A8 EP1517538 A8 EP 1517538A8 EP 04021914 A EP04021914 A EP 04021914A EP 04021914 A EP04021914 A EP 04021914A EP 1517538 A8 EP1517538 A8 EP 1517538A8
Authority
EP
European Patent Office
Prior art keywords
round
value
average output
reading apparatus
document reading
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP04021914A
Other languages
German (de)
English (en)
Other versions
EP1517538B1 (fr
EP1517538A1 (fr
Inventor
Yoshinobu Kagami
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Publication of EP1517538A1 publication Critical patent/EP1517538A1/fr
Publication of EP1517538A8 publication Critical patent/EP1517538A8/fr
Application granted granted Critical
Publication of EP1517538B1 publication Critical patent/EP1517538B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/40—Picture signal circuits
    • H04N1/401—Compensating positionally unequal response of the pick-up or reproducing head
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
    • H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
    • H04N25/67—Noise processing, e.g. detecting, correcting, reducing or removing noise applied to fixed-pattern noise, e.g. non-uniformity of response
    • H04N25/671—Noise processing, e.g. detecting, correcting, reducing or removing noise applied to fixed-pattern noise, e.g. non-uniformity of response for non-uniformity detection or correction

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Image Signal Circuits (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Image Input (AREA)
  • Transforming Light Signals Into Electric Signals (AREA)
  • Facsimile Heads (AREA)
EP04021914A 2003-09-18 2004-09-15 Appareil de lecture de documents Not-in-force EP1517538B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003326920A JP4340503B2 (ja) 2003-09-18 2003-09-18 原稿読取装置
JP2003326920 2003-09-18

Publications (3)

Publication Number Publication Date
EP1517538A1 EP1517538A1 (fr) 2005-03-23
EP1517538A8 true EP1517538A8 (fr) 2005-06-01
EP1517538B1 EP1517538B1 (fr) 2012-12-12

Family

ID=34191361

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04021914A Not-in-force EP1517538B1 (fr) 2003-09-18 2004-09-15 Appareil de lecture de documents

Country Status (3)

Country Link
US (1) US7609422B2 (fr)
EP (1) EP1517538B1 (fr)
JP (1) JP4340503B2 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007049673A (ja) * 2005-07-13 2007-02-22 Ricoh Co Ltd 画像読み取り装置、画像形成装置、画像検査装置及び画像形成システム
JP4678861B2 (ja) * 2006-01-26 2011-04-27 株式会社リコー 原稿読取装置及び原稿読取装置の原稿読取制御方法
US8018631B2 (en) * 2007-07-04 2011-09-13 Ricoh Company, Limited Original reading device and image forming apparatus
JP5648010B2 (ja) * 2012-03-30 2015-01-07 富士フイルム株式会社 機器の作動方法及び撮影装置と電子内視鏡装置
US9692922B2 (en) 2015-03-20 2017-06-27 Fuji Xerox Co., Ltd. Image reading substrate, image reading device, and image forming apparatus having equal distances of interconnects from output terminals to high-speed serial transmitting unit

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5027117A (en) * 1988-03-31 1991-06-25 Ricoh Company, Ltd. Conversion using a variable reference based on image density
JPH0693768B2 (ja) 1988-12-27 1994-11-16 日本電気株式会社 撮像信号処理装置
SG81892A1 (en) 1990-08-09 2001-07-24 Sony Corp Ccd having a pair of horizontal resisters
JP3096786B2 (ja) * 1992-01-16 2000-10-10 株式会社リコー 挿入された用紙パツクの包装シートを除去可能な画像形成装置の給紙装置
JPH0614188A (ja) 1992-06-26 1994-01-21 Ricoh Co Ltd 画像処理装置
JPH0974479A (ja) 1995-09-06 1997-03-18 Fuji Photo Film Co Ltd 固体撮像素子のオフセット補正回路
JP3766192B2 (ja) * 1997-11-13 2006-04-12 株式会社東芝 光電変換装置、光電変換方法、画像情報処理装置、画像情報処理方法、および画像形成装置
JPH11215298A (ja) * 1998-01-22 1999-08-06 Toshiba Corp 画像情報処理装置と画像情報処理方法と画像形成装置
US6252675B1 (en) * 1998-05-08 2001-06-26 Xerox Corporation Apparatus and method for halftone hybrid screen generation
JP2001211297A (ja) 2000-01-26 2001-08-03 Canon Inc 画像読み取り装置、方法及び記憶媒体
US7053941B1 (en) * 1999-08-19 2006-05-30 Canon Kabushiki Kaisha Image input apparatus
US7324236B2 (en) * 2000-02-01 2008-01-29 Canon Kabushiki Kaisha Discrepancy correction method and apparatus for correcting difference in levels of image signals obtained by an image sensor having a multiple output channels
JP2001346012A (ja) 2000-06-02 2001-12-14 Canon Inc 画像読取装置及び画像信号の調整方法
US6512523B1 (en) * 2000-03-27 2003-01-28 Intel Corporation Accurate averaging of elements using integer averaging
JP2002213946A (ja) * 2001-01-19 2002-07-31 Seiko Precision Inc イメージ信号出力方法、イメージ信号出力装置、測距装置及び撮像装置
US7102801B2 (en) * 2003-04-26 2006-09-05 Hewlett-Packard Development Company, L.P. Pulse-width modulated drivers for light-emitting units of scanning mechanism

Also Published As

Publication number Publication date
US7609422B2 (en) 2009-10-27
US20050105143A1 (en) 2005-05-19
JP2005094513A (ja) 2005-04-07
JP4340503B2 (ja) 2009-10-07
EP1517538B1 (fr) 2012-12-12
EP1517538A1 (fr) 2005-03-23

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